Keyboard



FIG. 1 is a top, front, right side perspective view of a keyboard showing my new design;

FIG. 2 is a top plan view thereof on a reduced scale, as taken in the direction of arrow 2 in FIG. 1;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof on a reduced scale;

FIG. 5 is a left side elevational view thereof on a reduced scale;

FIG. 6 is a front elevational view thereof on a reduced scale as taken in the direction of arrow 6 in FIG. 5;

FIG. 7 is a rear elevational view thereof on a reduced scale as taken in the direction of arrow 7 in FIG. 4. 

The ornamental design for a keyboard, substantially as shown and described. 